* Input driver to ExplorerPS/2 device driver module.
*
* Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2004 Dmitry Torokhov
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as published by
module_param(yres, uint, 0);
MODULE_PARM_DESC(yres, "Vertical screen resolution");
+static unsigned tap_time = 200;
+module_param(tap_time, uint, 0);
+MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)");
+
+struct mousedev_hw_data {
+ int dx, dy, dz;
+ int x, y;
+ int abs_event;
+ unsigned long buttons;
+};
+
struct mousedev {
int exist;
int open;
int minor;
- int misc;
char name[16];
wait_queue_head_t wait;
struct list_head list;
struct input_handle handle;
+
+ struct mousedev_hw_data packet;
+ unsigned int pkt_count;
+ int old_x[4], old_y[4];
+ unsigned long touch;
+};
+
+enum mousedev_emul {
+ MOUSEDEV_EMUL_PS2,
+ MOUSEDEV_EMUL_IMPS,
+ MOUSEDEV_EMUL_EXPS
+};
+
+struct mousedev_motion {
+ int dx, dy, dz;
+ unsigned long buttons;
};
+#define PACKET_QUEUE_LEN 16
struct mousedev_list {
struct fasync_struct *fasync;
struct mousedev *mousedev;
struct list_head node;
- int dx, dy, dz;
- int old_x[4], old_y[4];
- unsigned long buttons;
+
+ struct mousedev_motion packets[PACKET_QUEUE_LEN];
+ unsigned int head, tail;
+ spinlock_t packet_lock;
+ int pos_x, pos_y;
+
signed char ps2[6];
unsigned char ready, buffer, bufsiz;
- unsigned char mode, imexseq, impsseq;
- unsigned int pkt_count;
- unsigned char touch;
+ unsigned char imexseq, impsseq;
+ enum mousedev_emul mode;
};
#define MOUSEDEV_SEQ_LEN 6
static struct mousedev *mousedev_table[MOUSEDEV_MINORS];
static struct mousedev mousedev_mix;
-#define fx(i) (list->old_x[(list->pkt_count - (i)) & 03])
-#define fy(i) (list->old_y[(list->pkt_count - (i)) & 03])
+#define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
+#define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
-static void mousedev_abs_event(struct input_handle *handle, struct mousedev_list *list, unsigned int code, int value)
+static void mousedev_touchpad_event(struct mousedev *mousedev, unsigned int code, int value)
{
- int size;
- int touchpad;
+ if (mousedev->touch) {
+ switch (code) {
+ case ABS_X:
+ fx(0) = value;
+ if (mousedev->pkt_count >= 2)
+ mousedev->packet.dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) / 8;
+ break;
- /* Ignore joysticks */
- if (test_bit(BTN_TRIGGER, handle->dev->keybit))
- return;
+ case ABS_Y:
+ fy(0) = value;
+ if (mousedev->pkt_count >= 2)
+ mousedev->packet.dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) / 8;
+ break;
+ }
+ }
+}
- touchpad = test_bit(BTN_TOOL_FINGER, handle->dev->keybit);
+static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value)
+{
+ int size;
switch (code) {
case ABS_X:
- if (touchpad) {
- if (list->touch) {
- fx(0) = value;
- if (list->pkt_count >= 2)
- list->dx = ((fx(0) - fx(1)) / 2 + (fx(1) - fx(2)) / 2) / 8;
- }
- } else {
- size = handle->dev->absmax[ABS_X] - handle->dev->absmin[ABS_X];
- if (size == 0) size = xres;
- list->dx += (value * xres - list->old_x[0]) / size;
- list->old_x[0] += list->dx * size;
- }
+ size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
+ if (size == 0) size = xres;
+ if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X];
+ if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X];
+ mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size;
+ mousedev->packet.abs_event = 1;
break;
+
case ABS_Y:
- if (touchpad) {
- if (list->touch) {
- fy(0) = value;
- if (list->pkt_count >= 2)
- list->dy = -((fy(0) - fy(1)) / 2 + (fy(1) - fy(2)) / 2) / 8;
- }
- } else {
- size = handle->dev->absmax[ABS_Y] - handle->dev->absmin[ABS_Y];
- if (size == 0) size = yres;
- list->dy -= (value * yres - list->old_y[0]) / size;
- list->old_y[0] -= list->dy * size;
- }
+ size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y];
+ if (size == 0) size = yres;
+ if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y];
+ if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y];
+ mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size;
+ mousedev->packet.abs_event = 1;
break;
}
}
-static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value)
+{
+ switch (code) {
+ case REL_X: mousedev->packet.dx += value; break;
+ case REL_Y: mousedev->packet.dy -= value; break;
+ case REL_WHEEL: mousedev->packet.dz -= value; break;
+ }
+}
+
+static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value)
+{
+ int index;
+
+ switch (code) {
+ case BTN_TOUCH:
+ case BTN_0:
+ case BTN_FORWARD:
+ case BTN_LEFT: index = 0; break;
+ case BTN_STYLUS:
+ case BTN_1:
+ case BTN_RIGHT: index = 1; break;
+ case BTN_2:
+ case BTN_STYLUS2:
+ case BTN_MIDDLE: index = 2; break;
+ case BTN_3:
+ case BTN_BACK:
+ case BTN_SIDE: index = 3; break;
+ case BTN_4:
+ case BTN_EXTRA: index = 4; break;
+ default: return;
+ }
+
+ if (value) {
+ set_bit(index, &mousedev->packet.buttons);
+ set_bit(index, &mousedev_mix.packet.buttons);
+ } else {
+ clear_bit(index, &mousedev->packet.buttons);
+ clear_bit(index, &mousedev_mix.packet.buttons);
+ }
+}
+
+static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
{
- struct mousedev *mousedevs[3] = { handle->private, &mousedev_mix, NULL };
- struct mousedev **mousedev = mousedevs;
struct mousedev_list *list;
- int index, wake;
-
- while (*mousedev) {
-
- wake = 0;
-
- list_for_each_entry(list, &(*mousedev)->list, node)
- switch (type) {
- case EV_ABS:
- mousedev_abs_event(handle, list, code, value);
- break;
-
- case EV_REL:
- switch (code) {
- case REL_X: list->dx += value; break;
- case REL_Y: list->dy -= value; break;
- case REL_WHEEL: if (list->mode) list->dz -= value; break;
- }
- break;
-
- case EV_KEY:
- if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) {
- /* Handle touchpad data */
- list->touch = value;
- if (!list->touch)
- list->pkt_count = 0;
- break;
- }
-
- switch (code) {
- case BTN_TOUCH:
- case BTN_0:
- case BTN_FORWARD:
- case BTN_LEFT: index = 0; break;
- case BTN_4:
- case BTN_EXTRA: if (list->mode == 2) { index = 4; break; }
- case BTN_STYLUS:
- case BTN_1:
- case BTN_RIGHT: index = 1; break;
- case BTN_3:
- case BTN_BACK:
- case BTN_SIDE: if (list->mode == 2) { index = 3; break; }
- case BTN_2:
- case BTN_STYLUS2:
- case BTN_MIDDLE: index = 2; break;
- default: return;
- }
- switch (value) {
- case 0: clear_bit(index, &list->buttons); break;
- case 1: set_bit(index, &list->buttons); break;
- case 2: return;
- }
- break;
-
- case EV_SYN:
- switch (code) {
- case SYN_REPORT:
- if (list->touch) {
- list->pkt_count++;
- /* Input system eats duplicate events,
- * but we need all of them to do correct
- * averaging so apply present one forward
- */
- fx(0) = fx(1);
- fy(0) = fy(1);
- }
-
- list->ready = 1;
- kill_fasync(&list->fasync, SIGIO, POLL_IN);
- wake = 1;
- break;
- }
+ struct mousedev_motion *p;
+ unsigned long flags;
+
+ list_for_each_entry(list, &mousedev->list, node) {
+ spin_lock_irqsave(&list->packet_lock, flags);
+
+ p = &list->packets[list->head];
+ if (list->ready && p->buttons != packet->buttons) {
+ unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN;
+ if (new_head != list->tail) {
+ p = &list->packets[list->head = new_head];
+ memset(p, 0, sizeof(struct mousedev_motion));
+ }
+ }
+
+ if (packet->abs_event) {
+ p->dx += packet->x - list->pos_x;
+ p->dy += packet->y - list->pos_y;
+ list->pos_x = packet->x;
+ list->pos_y = packet->y;
+ }
+
+ list->pos_x += packet->dx;
+ list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x);
+ list->pos_y += packet->dy;
+ list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y);
+
+ p->dx += packet->dx;
+ p->dy += packet->dy;
+ p->dz += packet->dz;
+ p->buttons = mousedev->packet.buttons;
+
+ list->ready = 1;
+
+ spin_unlock_irqrestore(&list->packet_lock, flags);
+ kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ }
+
+ wake_up_interruptible(&mousedev->wait);
+}
+
+static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)
+{
+ if (!value) {
+ if (mousedev->touch &&
+ time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) {
+ /*
+ * Toggle left button to emulate tap.
+ * We rely on the fact that mousedev_mix always has 0
+ * motion packet so we won't mess current position.
+ */
+ set_bit(0, &mousedev->packet.buttons);
+ set_bit(0, &mousedev_mix.packet.buttons);
+ mousedev_notify_readers(mousedev, &mousedev_mix.packet);
+ mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet);
+ clear_bit(0, &mousedev->packet.buttons);
+ clear_bit(0, &mousedev_mix.packet.buttons);
+ }
+ mousedev->touch = mousedev->pkt_count = 0;
+ }
+ else
+ if (!mousedev->touch)
+ mousedev->touch = jiffies;
+}
+
+static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+ struct mousedev *mousedev = handle->private;
+
+ switch (type) {
+ case EV_ABS:
+ /* Ignore joysticks */
+ if (test_bit(BTN_TRIGGER, handle->dev->keybit))
+ return;
+
+ if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
+ mousedev_touchpad_event(mousedev, code, value);
+ else
+ mousedev_abs_event(handle->dev, mousedev, code, value);
+
+ break;
+
+ case EV_REL:
+ mousedev_rel_event(mousedev, code, value);
+ break;
+
+ case EV_KEY:
+ if (value != 2) {
+ if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
+ mousedev_touchpad_touch(mousedev, value);
+ else
+ mousedev_key_event(mousedev, code, value);
}
+ break;
- if (wake)
- wake_up_interruptible(&((*mousedev)->wait));
+ case EV_SYN:
+ if (code == SYN_REPORT) {
+ if (mousedev->touch) {
+ mousedev->pkt_count++;
+ /* Input system eats duplicate events, but we need all of them
+ * to do correct averaging so apply present one forward
+ */
+ fx(0) = fx(1);
+ fy(0) = fy(1);
+ }
+
+ mousedev_notify_readers(mousedev, &mousedev->packet);
+ mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
- mousedev++;
+ mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
+ mousedev->packet.abs_event = 0;
+ }
+ break;
}
}
mousedev_free(list->mousedev);
}
}
-
+
kfree(list);
return 0;
}
return -ENOMEM;
memset(list, 0, sizeof(struct mousedev_list));
+ spin_lock_init(&list->packet_lock);
+ list->pos_x = xres / 2;
+ list->pos_y = yres / 2;
list->mousedev = mousedev_table[i];
list_add_tail(&list->node, &mousedev_table[i]->list);
file->private_data = list;
if (list->mousedev->minor == MOUSEDEV_MIX) {
list_for_each_entry(handle, &mousedev_handler.h_list, h_node) {
mousedev = handle->private;
- if (!mousedev->open && mousedev->exist)
+ if (!mousedev->open && mousedev->exist)
input_open_device(handle);
}
- } else
- if (!mousedev_mix.open && list->mousedev->exist)
+ } else
+ if (!mousedev_mix.open && list->mousedev->exist)
input_open_device(&list->mousedev->handle);
}
return 0;
}
-static void mousedev_packet(struct mousedev_list *list, unsigned char off)
+static inline int mousedev_limit_delta(int delta, int limit)
{
- list->ps2[off] = 0x08 | ((list->dx < 0) << 4) | ((list->dy < 0) << 5) | (list->buttons & 0x07);
- list->ps2[off + 1] = (list->dx > 127 ? 127 : (list->dx < -127 ? -127 : list->dx));
- list->ps2[off + 2] = (list->dy > 127 ? 127 : (list->dy < -127 ? -127 : list->dy));
- list->dx -= list->ps2[off + 1];
- list->dy -= list->ps2[off + 2];
- list->bufsiz = off + 3;
-
- if (list->mode == 2) {
- list->ps2[off + 3] = (list->dz > 7 ? 7 : (list->dz < -7 ? -7 : list->dz));
- list->dz -= list->ps2[off + 3];
- list->ps2[off + 3] = (list->ps2[off + 3] & 0x0f) | ((list->buttons & 0x18) << 1);
- list->bufsiz++;
+ return delta > limit ? limit : (delta < -limit ? -limit : delta);
+}
+
+static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data)
+{
+ struct mousedev_motion *p;
+ unsigned long flags;
+
+ spin_lock_irqsave(&list->packet_lock, flags);
+ p = &list->packets[list->tail];
+
+ ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07);
+ ps2_data[1] = mousedev_limit_delta(p->dx, 127);
+ ps2_data[2] = mousedev_limit_delta(p->dy, 127);
+ p->dx -= ps2_data[1];
+ p->dy -= ps2_data[2];
+
+ switch (list->mode) {
+ case MOUSEDEV_EMUL_EXPS:
+ ps2_data[3] = mousedev_limit_delta(p->dz, 127);
+ p->dz -= ps2_data[3];
+ ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1);
+ list->bufsiz = 4;
+ break;
+
+ case MOUSEDEV_EMUL_IMPS:
+ ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
+ ps2_data[3] = mousedev_limit_delta(p->dz, 127);
+ p->dz -= ps2_data[3];
+ list->bufsiz = 4;
+ break;
+
+ case MOUSEDEV_EMUL_PS2:
+ default:
+ ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1);
+ p->dz = 0;
+ list->bufsiz = 3;
+ break;
}
-
- if (list->mode == 1) {
- list->ps2[off + 3] = (list->dz > 127 ? 127 : (list->dz < -127 ? -127 : list->dz));
- list->dz -= list->ps2[off + 3];
- list->bufsiz++;
+
+ if (!p->dx && !p->dy && !p->dz) {
+ if (list->tail != list->head)
+ list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
+ if (list->tail == list->head)
+ list->ready = 0;
}
- if (!list->dx && !list->dy && (!list->mode || !list->dz)) list->ready = 0;
- list->buffer = list->bufsiz;
+ spin_unlock_irqrestore(&list->packet_lock, flags);
}
-static ssize_t mousedev_write(struct file * file, const char * buffer, size_t count, loff_t *ppos)
+static ssize_t mousedev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
{
struct mousedev_list *list = file->private_data;
unsigned char c;
if (c == mousedev_imex_seq[list->imexseq]) {
if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
list->imexseq = 0;
- list->mode = 2;
+ list->mode = MOUSEDEV_EMUL_EXPS;
}
} else list->imexseq = 0;
if (c == mousedev_imps_seq[list->impsseq]) {
if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
list->impsseq = 0;
- list->mode = 1;
+ list->mode = MOUSEDEV_EMUL_IMPS;
}
} else list->impsseq = 0;
list->ps2[0] = 0xfa;
- list->bufsiz = 1;
switch (c) {
case 0xeb: /* Poll */
- mousedev_packet(list, 1);
+ mousedev_packet(list, &list->ps2[1]);
+ list->bufsiz++; /* account for leading ACK */
break;
case 0xf2: /* Get ID */
switch (list->mode) {
- case 0: list->ps2[1] = 0; break;
- case 1: list->ps2[1] = 3; break;
- case 2: list->ps2[1] = 4; break;
+ case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break;
+ case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
+ case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
}
list->bufsiz = 2;
break;
break;
case 0xff: /* Reset */
- list->impsseq = 0;
- list->imexseq = 0;
- list->mode = 0;
- list->ps2[0] = 0xaa;
- list->ps2[1] = 0x00;
- list->bufsiz = 2;
+ list->impsseq = list->imexseq = 0;
+ list->mode = MOUSEDEV_EMUL_PS2;
+ list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
+ list->bufsiz = 3;
+ break;
+
+ default:
+ list->bufsiz = 1;
break;
}
kill_fasync(&list->fasync, SIGIO, POLL_IN);
wake_up_interruptible(&list->mousedev->wait);
-
+
return count;
}
-static ssize_t mousedev_read(struct file * file, char * buffer, size_t count, loff_t *ppos)
+static ssize_t mousedev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
{
struct mousedev_list *list = file->private_data;
int retval = 0;
if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
- retval = wait_event_interruptible(list->mousedev->wait, list->ready || list->buffer);
+ retval = wait_event_interruptible(list->mousedev->wait,
+ !list->mousedev->exist || list->ready || list->buffer);
if (retval)
return retval;
- if (!list->buffer && list->ready)
- mousedev_packet(list, 0);
+ if (!list->mousedev->exist)
+ return -ENODEV;
+
+ if (!list->buffer && list->ready) {
+ mousedev_packet(list, list->ps2);
+ list->buffer = list->bufsiz;
+ }
if (count > list->buffer)
count = list->buffer;
if (copy_to_user(buffer, list->ps2 + list->bufsiz - list->buffer - count, count))
return -EFAULT;
- return count;
+ return count;
}
/* No kernel lock - fine */
devfs_mk_cdev(MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
S_IFCHR|S_IRUGO|S_IWUSR, "input/mouse%d", minor);
- class_simple_device_add(input_class,
+ class_simple_device_add(input_class,
MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
dev->dev, "mouse%d", minor);
};
MODULE_DEVICE_TABLE(input, mousedev_ids);
-
+
static struct input_handler mousedev_handler = {
.event = mousedev_event,
.connect = mousedev_connect,
static struct miscdevice psaux_mouse = {
PSMOUSE_MINOR, "psaux", &mousedev_fops
};
+static int psaux_registered;
#endif
static int __init mousedev_init(void)
NULL, "mice");
#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
- if (!(mousedev_mix.misc = !misc_register(&psaux_mouse)))
+ if (!(psaux_registered = !misc_register(&psaux_mouse)))
printk(KERN_WARNING "mice: could not misc_register the device\n");
#endif
static void __exit mousedev_exit(void)
{
#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX
- if (mousedev_mix.misc)
+ if (psaux_registered)
misc_deregister(&psaux_mouse);
#endif
devfs_remove("input/mice");
git://git.onelab.eu / linux-2.6.git / blobdiff